Home / 20,429.10-30,643.65-13,430.70

Finding the Fourth Proportional to 20,429.10, 30,643.65 and 13,430.70

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Solution

The fourth proportional to 20,429.10, 30,643.65 and 13,430.70 is: 20,146.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.10 : 30,643.65 = 13,430.70 : x
  2. Step 2: Convert to fraction form
    20,429.10/30,643.65 = 13,430.70/x
  3. Step 3: Cross multiply
    20,429.10x = 30,643.65 × 13,430.70
  4. Step 4: Simplify right side
    20,429.10x = 411,565,670.06
  5. Step 5: Solve for x
    x = 411,565,670.06/20,429.10
  6. Step 6: Final answer
    x = 20,146.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.